CN110529714B - Tripod capable of being quickly folded and unfolded - Google Patents
Tripod capable of being quickly folded and unfolded Download PDFInfo
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- CN110529714B CN110529714B CN201910872262.XA CN201910872262A CN110529714B CN 110529714 B CN110529714 B CN 110529714B CN 201910872262 A CN201910872262 A CN 201910872262A CN 110529714 B CN110529714 B CN 110529714B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 230000001360 synchronised effect Effects 0.000 claims abstract description 23
- 230000009471 action Effects 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 description 37
- 239000010959 steel Substances 0.000 description 37
- 230000006872 improvement Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/32—Undercarriages for supports with three or more telescoping legs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/32—Undercarriages for supports with three or more telescoping legs
- F16M11/34—Members limiting spreading of legs, e.g. "umbrella legs"
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention discloses a tripod capable of being quickly folded and unfolded, which comprises: the handle is provided with a traction rope and an operating mechanism, and one end of the traction rope is connected with the operating mechanism; when the handle is held and pressed, the operating mechanism drives the traction rope to move in the vertical direction; the bracket comprises a plurality of synchronous opening mechanisms which synchronously rotate by the same angle under the action of external force; each supporting leg is connected with one synchronous opening mechanism; each supporting leg comprises a plurality of sections of foot pipes which are connected in a nested manner, and the next section of foot pipe can be nested outside the previous section of foot pipe; the inside of each adjacent foot tube is provided with a transmission and locking device; the other end of the traction rope is divided into a plurality of branches which respectively penetrate into a plurality of supporting legs; the traction rope pulls the lower transmission and locking device to realize synchronous retraction of a plurality of foot tubes of each supporting leg. The invention realizes the rapid retraction of the multi-section foot tube, and greatly simplifies the retraction operation of the tripod.
Description
Technical Field
The invention relates to a tripod capable of being quickly folded and unfolded, which is used for supporting cameras, video cameras, lamps, measuring instruments and other applicable equipment.
Background
The telescopic tripod consists of a plurality of foot tubes, joints are arranged between each foot tube and used for locking the connection between the two foot tubes, and each joint of the traditional tripod leg needs to be respectively locked and released. If each leg consists of 3 joints, there are 6 joints in one tripod. The traditional tripod needs to do 6 actions to lock 6 joints and then do 6 actions to relax 6 joints.
There are two types of fast retractable tripods which appear in the market in recent years:
1. the joints are not required to be locked respectively, but the eccentric circular supporting legs are rotated by two hands, and the supporting legs are locked by mutual extrusion friction of the walls of the upper leg pipe and the lower leg pipe, so that the device is convenient and quick. However, the material of the support leg is elastic, the rigidity is poor, the locking reliability is poor, the bearing capacity is low, and the three support legs are required to be respectively locked and unlocked.
"one lock three" camera tripod: the bearing performance and stability can reach the level of a common tripod, but the size and the weight are large, and the three supporting legs are respectively locked and unlocked.
The method for realizing the same-angle opening and closing of the three supporting legs by the traditional tripod comprises the following steps: the lower ends of the first leg pipes of each supporting leg are connected together by connecting rods, and both ends of the connecting rods are hinged.
Disclosure of Invention
In order to solve the problem that the tripod in the prior art cannot be rapidly folded and unfolded, the invention provides the tripod capable of being rapidly folded and unfolded, the handle can be held to realize synchronous unlocking of all joints, and the handle is unfolded to realize synchronous locking of all joints.
The invention comprises two schemes which can realize the functions.
A quick retraction tripod comprising:
the handle is an operating device of the tripod. The handle is provided with a traction rope and an operating mechanism, and one end of the traction rope is connected with the operating mechanism; when the operating mechanism of the handle is held and pressed, the operating mechanism drives the traction rope to move in the vertical direction;
the bracket is a device for connecting the handle and the supporting leg. The support is connected with the handle and comprises a plurality of synchronous opening mechanisms which synchronously rotate by the same angle under the action of external force;
and a plurality of legs, the legs being support portions of the tripod. Each supporting leg is connected with a synchronous opening mechanism; each supporting leg comprises a plurality of sections of foot pipes which are connected in a nested manner, and the next section of foot pipe can be nested outside the previous section of foot pipe; the uppermost leg is called the first leg, the lower leg is called the second leg, and so on; the inside of each adjacent foot tube is provided with a transmission and locking device; the other end of the traction rope is divided into a plurality of branches which respectively penetrate into a plurality of supporting legs; the traction rope pulls the lower transmission and locking device to realize synchronous retraction of a plurality of foot tubes of each supporting leg.
As a further improvement of the invention, the operating mechanism comprises a grab handle, a connecting rod, a guide rail and an elastic piece, wherein the guide rail is arranged in the holding part, the end part of the traction rope is connected with one end part of the connecting rod and is arranged in the guide rail, the other end part of the connecting rod is hinged with the upper end part of the grab handle, and the lower part of the grab handle is hinged outside the holding part; the elastic piece is arranged between the grab handle and the holding part; the elastic member may be a spring plate or a compression spring.
As a further improvement of the invention, at least two rollers are arranged in the holding part, and the traction rope winds around the at least two rollers so that the lower end of the traction rope is arranged along the axis of the handle.
As a further improvement of the invention, the synchronous opening mechanism comprises a support and bevel gears, wherein a plurality of the supports are uniformly distributed at the lower end of the handle, two sides of each support are provided with one bevel gear through a gear base, and two bevel gears at the same side of two adjacent supports are meshed; the lower end of each gear base is connected with one supporting leg; the support is internally provided with a through hole for the branch of the hauling rope to pass through.
As a further improvement of the present invention, the transmission and locking device includes a rack, a lock catch, and a resilient member;
in the foot tubes of the plurality of sections, racks are arranged on the inner walls of the other foot tubes except the first foot tube;
the lower ends of the foot pipes except the last foot pipe are provided with locking clips and elastic pieces; two sides of each locking clip are axially connected to the inner wall of the corresponding foot tube, one end of each elastic piece is connected with the inner wall of the corresponding foot tube, and the other end of each elastic piece is connected with the tail part of the corresponding locking clip; the lower end of the traction rope is sequentially connected with the tail parts of a plurality of locking clips;
the joint is a mechanism for connecting two adjacent leg pipes, the head of each locking clip is inserted into the corresponding rack and is tightly supported by the elastic piece, so that the two adjacent leg pipes cannot slide relatively, and the joint is called locking joint; when the traction rope moves, the head of the locking clamp is driven to rotate downwards and separate from the corresponding rack, so that two adjacent foot tubes can slide relatively, and the joint is called as loosening (or unlocking); the joint between the first and second foottubes is referred to as a first joint, the joint between the second and third foottubes is referred to as a second joint, and so on.
As a further improvement of the invention, in the foot tubes of the sections, the locking clamp at the second joint is fixedly connected with the traction rope, the tail part of the locking clamp at the first joint is provided with a hole with the diameter slightly larger than that of the traction rope, after the traction rope passes through the hole downwards, the position of the half length of the holding stroke of the operating mechanism is provided with a blocking piece with the diameter larger than that of the locking clamp, when the traction rope pulls upwards, the locking clamp at the second joint is separated from the rack, the second joint is unlocked, the first joint is still in a locking state, and when the traction rope moves upwards to half of the stroke, the blocking piece is blocked on the hole of the locking clamp at the first joint, so that the locking clamp is separated from the rack, and then the first joint is unlocked.
As a further improvement of the invention, an anti-falling structure is arranged between the adjacent foot tubes; the anti-drop structure is including setting up recess and the anticreep screw on the foot pipe outer wall, and the recess sets up along foot pipe length direction, and the anticreep screw passes lower foot pipe setting in the recess of last foot pipe.
As a further development of the invention, the transmission and locking device comprises a rack, a locking clip, a hollow shaft seat and an elastic piece;
in the foot tubes of the plurality of sections, racks are arranged on the inner walls of the other foot tubes except the first foot tube;
the lower ends of the foot pipes except the last foot pipe are provided with locking clips, hollow shafts, hollow shaft seats and elastic pieces;
the lower end of the traction rope is connected with the side wall of the hollow shaft of the first section, one end of each elastic piece is connected with the inner wall of the corresponding foot pipe, and the other end of each elastic piece is connected with the corresponding side wall of the hollow shaft; the hollow shaft is connected with the hollow shaft seat in a shaft way, and the hollow shaft seat is connected with the lower end of the first leg pipe; the transmission shaft penetrates through the hollow shaft and the hollow shaft seat; the lower end of the hollow shaft is connected with a locking clip; two adjacent leg pipes are fixedly connected;
when the traction rope moves, the hollow shaft is pulled to rotate, the transmission shaft is driven to synchronously rotate, and then the head of the locking clamp is driven to horizontally rotate and separate from the corresponding rack, so that the retraction and the release of two adjacent foot tubes are realized.
As a further improvement of the invention, the bottom of the first leg pipe is provided with a guide shaft, and the lower end of the traction rope bypasses the guide shaft to be connected with the side wall of the hollow shaft; the center of the hollow shaft is a non-circular hole, and the transmission shaft penetrates into the non-circular hole and passes through the hollow shaft seat; racks are arranged on two sides of the inner wall of the foot pipe, and a plurality of teeth matched with the racks are arranged on two short sides of the locking clamp.
As a further development of the invention, the cross section of the foot tube is circular, oval, square or trapezoidal.
Compared with the prior art, the invention has the following advantages:
the handle is arranged above the joint of the three support legs, synchronous unlocking of all joints of the three support legs can be achieved through one action of holding and pressing the handle by one hand, and synchronous locking of all joints of the three support legs can be achieved by loosening the holding and pressing of the handle. The transmission between the handle and the first joint is completed by a traction rope. If one tripod is provided with three foot tubes, the action quantity can be reduced to 1/6, thereby realizing the rapid retraction of the three foot tubes and greatly simplifying the retraction operation of the tripod.
Further, the realization mode of synchronous opening of three supporting legs: the upper end of each pin is provided with a pair of bevel gears, the three pairs of bevel gears are meshed with each other, and when one supporting leg is held by two hands to be broken into a certain angle, the third supporting leg can be synchronously opened at the same angle by the transmission of the gears.
Further, the multi-section foot tube is linked by a steel wire rope or a transmission shaft inside the supporting leg. The locking joint (i.e., limiting the relative sliding movement between the two legs) is accomplished by a rack lock catch mechanism.
Drawings
Fig. 1 is an overall external view of embodiment 1 of the present invention.
Fig. 2 is an external view and an internal view of a handle portion of embodiment 1 of the present invention.
Fig. 3 is an external view and an internal view of the stent of embodiment 1 of the present invention.
Fig. 4 is an external view and an internal view of a first joint of a single leg of embodiment 1 of the present invention.
Fig. 5 is an external view and an internal view of the first joint of the three legs of embodiment 1 of the present invention.
Fig. 6 is an external view and an internal view of the second joint of the single leg of embodiment 1 of the present invention.
Fig. 7 is an external view and an internal view of the limit screw and the clamping groove between every two leg pipes in embodiment 1 of the present invention.
Fig. 8 is an inner plan view of a single leg first joint according to embodiment 2 of the present invention.
Fig. 9 is an inner plan view of a single leg first joint according to embodiment 2 of the present invention.
Fig. 10 is a bottom view of the first joint of embodiment 2 of the present invention.
Fig. 11 is an inner plan view of a single leg second joint according to embodiment 2 of the present invention.
Fig. 12 is a bottom view of the second joint of embodiment 2 of the present invention.
The drawings are marked: the 2 embodiments are A, B respectively, and the structure of each tripod consists of three parts: 1 handle, 2 support, 3 landing leg.
Wherein: the handles, brackets and legs of example 1 are designated A1, A2 and A3 respectively, the parts of the handles are designated A11-A18, the parts of the brackets are designated A21-A24, and the parts of the legs are designated A31-A39. A1, a handle, A2, a support, A3, a support leg, A11, a cradle head bearing plate, A12, a screw, A13, a grab handle, A14, a grab handle connecting rod, A15, a grab handle connecting rod guide rail, A16, a grab handle spring piece, A17, a wire rope roller, A18, a wire rope, A21, a support, A22, a gear base, A23, a bevel gear, A24, a shaft, A31, a first leg pipe, A32, a second leg pipe, A33, a third leg pipe, A34, a blocking piece, A35, a leg pipe anti-falling screw, A36, a locking clip, A37, a connecting shaft of a locking clip connected to the leg pipe, A38, a locking clip spring piece, and racks of the inner walls of the first leg pipe, the second leg pipe and the third leg pipe.
The handles, brackets and legs of example 2 are respectively denoted by B1, B2 and B3, the parts of the handles are denoted by B11-B18, the parts of the brackets are denoted by B21-B24, and the parts of the legs are denoted by B301-B317. B18, a steel wire rope, B301, a first leg pipe, B302, a second leg pipe, B303, a third leg pipe, B305, a leg pipe anti-falling screw, B307, a guide shaft, B308, a hollow shaft seat, B309, a hollow shaft, B310, a spring piece, B311, a hollow shaft hole, B312, a transmission shaft, B313, a locking clamp, B314, a rack, B315, a transmission shaft seat, B316, a locking clamp, B317 and a rack.
Detailed Description
The following describes in detail a specific embodiment of the present invention with reference to the drawings, but the present invention is not limited to this example. In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention.
The invention is further illustrated by the following examples which are given in detail:
the rapid retractable tripod consists of three parts: handle, support, landing leg.
The handle is provided with a traction rope and an operating mechanism, and one end of the traction rope is connected with the operating mechanism; when the handle is held and pressed, the operating mechanism drives the traction rope to move in the vertical direction;
the bracket comprises a plurality of synchronous opening mechanisms which synchronously rotate by the same angle under the action of external force;
each supporting leg is connected with one synchronous opening mechanism; each supporting leg comprises a plurality of sections of foot pipes which are connected in a nested manner, and the next section of foot pipe can be nested outside the last section of foot pipe; the inside of each adjacent foot tube is provided with a transmission and locking device; the other end of the traction rope is divided into a plurality of branches which respectively penetrate into a plurality of supporting legs; the traction rope pulls the lower transmission and locking device to realize synchronous retraction of a plurality of foot tubes of each supporting leg.
The implementation method of the components comprises the following steps:
three major components illustrate:
1. a handle: the whole joints of all the supporting legs can be opened by one action of pressing the handle by one hand, and the whole joints can be locked by one action of releasing the handle. When the handle is held and pressed, the grab handle connecting rod pulls one steel wire rope to move upwards, the lower end of the steel wire rope is connected with three steel wire ropes, and the steel wire ropes respectively penetrate into the three supporting legs.
2. And (3) a bracket: synchronous opening mechanism of support leg: the main body of the bracket is formed by fixedly connecting 3 hollow cubes (called brackets), the brackets are hinged with 6 bevel gears through shafts or half shafts, gears are respectively and fixedly connected with gear bases, and the gear bases are respectively and fixedly connected with 3 supporting legs. 3 sets of 6 bevel gears, with every 2 gears intermeshed. When two hands hold the two supporting legs to open or close respectively, the third supporting leg can open or close synchronously. Such a synchronizing mechanism is not an essential part of the present invention and may be replaced with a conventional synchronizing mechanism. Locking mode of opening angle of three supporting legs (namely locking mode of 6 bevel gears): a movable pin is added at the near-meshing position of two mutually meshed bevel gears, so that the movable pin can prop against the teeth of the gears, the gears cannot rotate, and the opening angle of the three supporting legs is locked. The structure is simple and is not shown. The steel wire rope of the handle penetrates into the supporting leg from the support.
3. And (3) supporting legs: each supporting leg consists of a plurality of sections of foot tubes, and the plurality of sections of foot tubes are mutually nested and can slide (shrink and release) relatively. Because the transmission and locking device is arranged in the tripod supporting leg, the pipe diameter of the uppermost foot pipe is minimum, and the pipe diameter of the lowermost foot pipe is maximum. The cross section of the supporting leg can be round, elliptic, square, trapezoid and the like, and related mechanisms can be correspondingly adjusted, so that the principle is the same.
The transmission mechanism inside the supporting leg has two kinds: a. two steel wire ropes are arranged in the two foot tubes. b. The first leg pipe is internally provided with a steel wire rope, and the second leg pipe is internally provided with a transmission shaft. Racks are arranged on the inner walls of the second leg tube and the third leg tube. And (3) joint: the joint refers to a device that connects two foottubes, the joint between the first foottube and the second foottube being referred to as a first joint, the joint between the second foottube and the third foottube being referred to as a second joint. The joint comprises an external mechanism and an internal mechanism, the external mechanism is a foot tube anti-falling device (screw and nut) at the joint, the foot tube can be prevented from being separated after relatively sliding to the end in normal use, and the foot tube can be separated by unscrewing the screw. The internal mechanism is a locking device.
The joint locking is realized by locking the rack by a locking clip, and there are two kinds: a. one steel wire rope drives the locking clamp to rotate in the vertical direction; b. the locking clamp is driven to rotate in the horizontal direction by adding a transmission shaft to a steel wire rope. See the examples for details.
The tripod can also be provided with a fourth joint pin, the structural design of the tripod is the same as that of the third joint pin, and the proposal of using the transmission shaft only needs the second transmission shaft to be a hollow square tube and internally penetrate the third transmission shaft.
The method for realizing synchronous opening of the three support legs by the mutual meshing of the 6 bevel gears in the tripod can also be replaced by a traditional connecting rod synchronous method, and is not an essential component of the tripod.
When the tripod is in a contracted state and needs to be released, the locked tripod is lifted to be suspended, one hand holds the handle to enable all joints to be loosened, the supporting legs naturally fall and expand due to gravity, and when the supporting legs are expanded to any height within the maximum height and are enabled to prop against the ground, the handle is loosened to enable all joints to be locked. When the tripod needs to be contracted, the three supporting legs are firstly gathered, the handle is held to loosen all joints, the tripod is wholly pressed downwards, the ground is in contact with the supporting legs to be contracted to the minimum height, and the handle is loosened to lock all joints. This configuration allows the three legs to be locked at any height between a minimum contracted height and a maximum extended height, respectively. When the ground is uneven, the three supporting legs are unfolded and are abutted against the ground with different heights, and the three supporting legs can be simultaneously fixed at the required heights by the locking joints.
The following describes the invention in detail with reference to specific examples (taking three leg tubes as examples):
example 1
Tripod driven by steel wire rope for each leg tube:
as shown in fig. 1, the tripod is composed of three major parts: handle A1, support A2, landing leg A3 (3). The handle A1 is connected with the support leg A3 through the support A2.
Fig. 2 shows the handle in the joint locked state. At least two rollers A17 are arranged in the holding part of the handle, and the traction rope winds around the at least two rollers A17;
the operating mechanism comprises a grab handle A13, a connecting rod A14, a guide rail A15 and a grab handle spring piece A16, wherein the guide rail A15 is arranged in the holding part, the end part of the traction rope is connected with one end part of the connecting rod A14 and is arranged in the guide rail A15, the other end part of the connecting rod A14 is hinged with the upper end part of the grab handle A13, and the lower part of the grab handle A13 is hinged outside the holding part; the spring piece A16 is arranged between the grab handle A13 and the holding part.
When the handle A13 is held by one hand, the connecting rod A14 moves in the guide A15, one end of the connecting rod A14 is connected with the steel wire rope A18, and the steel wire rope A18 moves upwards along with the connecting rod A. The steel wire ropes A18 can be positioned at the central position inside the handle after bypassing the two steel wire rope rolling shafts A17, the lower ends of the steel wire ropes A18 are connected with three steel wire ropes, and the three steel wire ropes respectively penetrate through the A2 support and enter the inside of the three supporting legs A3.
As a preferred embodiment, the grip a13 is further provided with a spring piece a16 inside to provide a resilient force.
As shown in fig. 3, the external structure of the bracket A2 is composed of three parts, the synchronous opening mechanism comprises a support a21, bevel gears a23, a gear base a22 and a shaft a24, a plurality of the supports a21 are uniformly distributed at the lower end of the handle, two bevel gears a23 are arranged at two sides of each support a21, and two bevel gears a23 at the same side of two adjacent supports a21 are meshed; the lower end of each support A21 is connected with one supporting leg. The support A21 is formed by fixedly connecting three hollow cubes, namely a through hole for the traction rope to pass through is formed in the support A21. 120 degrees between each cube. A23 is a bevel gear, and the total number of the bevel gears is 6, and every two bevel gears are meshed with each other. The bevel gear A23 is fixedly connected with the gear base A22 and the shaft A24, and the shaft A24 is hinged with the support A21. The lower end of the gear base A22 is fixedly connected with the upper end of the first foot pipe A31. When two legs are respectively held by two hands and are broken, the gear base A22 drives the bevel gears A23 to rotate, the 6 bevel gears can only synchronously rotate by the same angle, and the 3 legs can only synchronously open by the same angle. The inner walls of the second leg pipe A32 and the third leg pipe A33 are provided with racks, and the inner wall of the first leg pipe A31 is not provided with racks.
FIG. 4 shows the transmission and locking device including a rack, a lock catch and a lock catch spring plate;
in the foot tubes of the plurality of sections, racks are arranged on the inner walls of the other foot tubes except the first foot tube;
the lower ends of the foot pipes except the last foot pipe are provided with locking clips and spring pieces; two ends of each locking clip are connected with the inner wall of the corresponding foot pipe in a shaft way, one end of each spring piece is connected with the inner wall of the corresponding foot pipe, and the other end of each spring piece is connected with the corresponding locking clip; the lower end of the traction rope is sequentially connected with the tail parts of a plurality of locking clips;
when the joint is locked, the head of each locking clip is inserted into the corresponding rack and is tightly propped up by the spring piece; when the traction rope moves, the head of the locking clamp is driven to rotate downwards and separate from the corresponding rack, so that the retraction and the release of two adjacent foot tubes are realized.
The three steel wire ropes A18 respectively penetrate through the three hollow supports A21 and then penetrate into the three supporting legs A31, and are fixedly connected with the tail parts of the locking clips A36 at the lower ends of the first leg pipes. The lock clip a36 is hinged to the lower end of the leg a21 by a shaft a 37. One end of the spring piece A37 is hinged to the tail of the locking clip A36, and the other end of the spring piece A is hinged to the lower end of the supporting leg A21. In the joint locking state, the head of the locking clip a36 is inserted into the rack a39 and is pressed against by the spring piece a38, thereby locking the sliding displacement of the second footer a32 relative to the first footer a 31. When the steel wire rope A18 is lifted up, the head of the locking clip A36 is driven to rotate downwards, the locking clip is separated from the rack on the inner wall of the second leg pipe A32, and sliding between the second leg pipe A32 and the first leg pipe A31 is unlocked.
As shown in fig. 5, the joint between the second leg pipe a32 and the third leg pipe is the same as the previous joint in structure. When the previous joint is unlocked, the steel wire rope A18 pulls the next joint to be synchronously unlocked. After unlocking, the three-leg tube can relatively slide to any position. When the grip A13 is released, the grip spring piece A16 rebounds and resets the grip A13. At the same time, the locking clip spring piece A38 also rebounds and resets the locking clip A36, and the locking clip A36 can be clamped into the rack again at any position on the rack for locking.
Fig. 7 shows a leg anti-disengagement mechanism: a supporting leg anti-falling mechanism is also arranged between the adjacent foot pipes; the landing leg anti-falling mechanism comprises a groove and an anti-falling screw, wherein the groove is formed in the outer wall of the foot pipe, the groove is formed in the length direction of the foot pipe, and the anti-falling screw penetrates through the lower foot pipe and is arranged in the groove of the upper foot pipe.
In order to prevent the upper leg from falling out from the lower leg when the upper leg slides to the tail end of the lower leg, two legs are separated, one outer wall of the first leg and one outer wall of the second leg are provided with grooves, the lower ends of the grooves are provided with protrusions (namely, the grooves on the two sides of the grooves are at the same height.). When the tripod supporting legs are disassembled, the screw can be screwed out. Both the first joint and the second joint have this same anti-disengagement structure.
When the wire rope is pulled up and the locking clips of the two joints are simultaneously opened, and the supporting legs gradually shrink from the all-extending state, before the second leg pipe is not completely retracted into the third leg pipe, the first leg pipe may be partially retracted into the second leg pipe, at this time, the wire rope in the second leg pipe becomes bent, the tension is lost, the locking clips at the second joint are pushed back to the rack by the spring pieces of the locking clips, the third supporting legs are locked to slide relative to the second supporting legs, and the second leg pipe may be incompletely retracted into the third leg pipe.
Means for solving this problem: the locking clamp at the second joint is fixedly connected with the steel wire rope, the tail part of the locking clamp at the first joint is provided with a hole with the diameter slightly larger than that of the steel wire rope, after the steel wire rope passes through the hole downwards, the position of the half length of the holding stroke of the operating mechanism is provided with a blocking piece (such as a knot, a blocking piece, a blocking ring and the like), the blocking piece is larger than the aperture of the locking clamp, the holding stroke is less than half stroke, the steel wire rope pulls upwards, the locking clamp at the second joint is firstly separated from the rack, the second joint is unlocked, the first joint is still in a locking state, the tripod is pressed downwards at the moment, the ground is abutted against the third joint pipe, the second joint pipe is completely retracted into the third joint pipe, then the holding stroke is completely pressed, when the steel wire rope moves upwards to half of the stroke, the blocking piece is blocked in the hole of the locking clamp at the first joint, the locking clamp is pulled to be separated from the rack, at the moment, the first joint is continuously pressed towards the ground, the tripod is enabled to be completely retracted into the second joint pipe, the tripod is released, the two locking clamps are blocked at the lowest ends respectively, and all the locking racks can not slide out. The holding pressure of the handle is released at any position in the whole contraction process, and the locking clamp clamps the current position of the rack, so that the tripod can be locked at the position in height.
The opposite stroke: when the tripod is in a completely contracted and locked state, the tripod is lifted to be suspended, the grab handle is completely held and pressed, the locking clamp of the first joint is opened, and the locking clamp of the second joint is still clamped because the steel wire rope in the second joint pipe is loose and bent and cannot be subjected to tensile force. Because of gravity, the second leg tube and the third leg tube slide out of the first leg tube completely, the sum of the weight of the second leg tube and the weight of the third leg tube is larger than the elasticity of the locking clip spring piece at the second joint, so that a steel wire rope in the second leg tube is tightly tightened completely, the locking clip of the second joint is opened, and then the third leg tube slides out of the second leg tube, and the tripod leg extending process is completed. The holding pressure of the handle is released at any position in the whole extending process, and the locking clamp clamps the current position of the rack, so that the height of the tripod can be locked at the position.
For the embodiment shown in the figure, the locking clip can be reduced by half, and a locking clip is additionally arranged on the opposite rack, and the steel wire ropes on the upper side and the lower side of the locking clip are designed to be in a one-to-two structure, so that the stability of the joint locking can be improved.
Example 2
Tripod driven by steel wire rope for first leg tube and driven by transmission shaft for second leg tube:
the tripod has the same appearance, handle and bracket as those of embodiment 1, and the transmission mechanism and joint locking mechanism in the leg are different from those of embodiment 1. Only the different parts are described below.
The transmission and locking device comprises a rack, a locking clip, a hollow shaft seat and a spring piece;
in the foot tubes of the plurality of sections, racks are arranged on the inner walls of the other foot tubes except the first foot tube;
the lower ends of the foot pipes except the last foot pipe are provided with locking clips, hollow shafts, hollow shaft seats and spring pieces;
the lower end of the steel wire rope is connected with the side wall of the hollow shaft of the first section, one end of each spring piece is connected with the inner wall of the corresponding foot pipe, and the other end of each spring piece is connected with the corresponding side wall of the hollow shaft; the hollow shaft is connected with the hollow shaft seat in a shaft way, and the hollow shaft seat is connected with the lower end of the first leg pipe; the transmission shaft penetrates through the hollow shaft and the hollow shaft seat; the lower end of the hollow shaft is connected with a locking clip; the transmission shafts of two adjacent leg pipes are connected through a connecting rod;
when the steel wire rope moves, the hollow shaft is pulled to rotate, the transmission shaft is driven to synchronously rotate, and then the head of the locking clamp is driven to horizontally rotate and separate from the corresponding rack, so that the retraction and the release of two adjacent foot tubes are realized.
The bottom of the first leg pipe is provided with a guide shaft B307, and the lower end of the steel wire rope bypasses the guide shaft B307 and is connected with the side wall of the hollow shaft B309; the center of the hollow shaft B309 is a non-circular hole, and the transmission shaft B312 penetrates into the non-circular hole and passes through the hollow shaft seat B308; racks are arranged on two sides of the inner wall of the foot pipe, and a plurality of teeth matched with the racks are arranged on two short sides of the locking clamp.
Fig. 8 is a top view showing the joint between the first and second foottubes of embodiment 2 of the present invention. The wire rope B18 penetrates the first leg pipe B301, and when reaching the first joint, bypasses the guide shaft B307 and is fixedly connected with the hollow shaft B309. Hollow shaft B309 is nested in hollow shaft seat B308, can freely rotate and can not slide up and down, and hollow shaft seat B308 is fixedly connected with the lower end of first leg pipe B301. The hollow shaft B309 has a hollow shaft hole B311 at the center, and a transmission shaft B312 penetrates into the hollow shaft hole B311 from below. When the handle is held, the steel wire rope in the first leg pipe ascends, and the hollow shaft B309 is pulled to rotate clockwise, so that the transmission shaft B312 is driven to rotate synchronously. When the grip of the handle is released, the spring piece B310 rotates anticlockwise against the hollow shaft B309 to reset. The guide shaft B307 limits the steel wire rope B18 at one corner in the first leg pipe and then vertically upwards, and a space can be reserved for the transmission shaft B312 to shrink into the first leg pipe.
Fig. 9 is a front view showing an inner view of the first joint according to embodiment 2 of the present invention. Hollow shaft B309 passes downwardly through hollow shaft seat B308 and is fixedly connected to lock catch B313 at the lower end thereof, the lock catch being substantially rectangular in shape with 3 teeth on each short side and 6 teeth on each side.
Fig. 10 is a bottom view of the joint between the first and second foottubes of embodiment 2 of the present invention. The locking clips B313 are respectively caught in racks B314 on both long sides of the rectangular inner wall of the second leg tube B302, thereby locking the joint (i.e., locking the displacement of the first leg tube with respect to the second leg tube). When the steel wire rope is pulled to drive the hollow shaft B309 to rotate, the locking clamp B313 is driven to synchronously rotate, so that the locking clamp is rotated out of the rack in the horizontal direction, the clamp tip is perpendicular to the short side of the inner wall of the rectangular foot tube, the inner wall of the foot tube cannot be touched, the two foot tubes can relatively slide, and the first foot tube can be retracted into the second foot tube. Simultaneously, the transmission shaft B312 is driven to synchronously rotate.
Fig. 11 is a plan view showing an inner view of the second joint of embodiment 2 of the present invention. The lower end of the drive shaft B312 is a cylinder which is nested in the drive shaft seat B315, and the lower end of the drive shaft is fixedly connected with the locking clip B316 after the drive shaft passes through the drive shaft seat downwards. The basic shape of the locking clip is cuboid, 3 teeth are arranged on each short edge, 6 teeth are arranged on two sides, and the locking clip is the same as the locking clip of the previous joint in shape and larger in size.
Fig. 12 is a bottom view of the second joint of embodiment 2 of the present invention. The mechanism of the second joint is basically the same as that of the first joint. The lock hooks B316 are respectively caught in racks B317 on both long sides of the rectangular inner wall of the third leg tube B303, thereby locking the joint. When the transmission shaft B312 rotates, the locking clamp B316 is driven to synchronously rotate, so that the locking clamp is rotated out of the rack in the horizontal direction, the clamping tip is perpendicular to the short side of the inner wall of the rectangular supporting leg, the inner wall of the supporting leg cannot be touched, the two leg tubes can relatively slide, and the second leg tube can retract into the third leg tube.
The tripod can also be provided with a fourth section of pin, the structural design of the tripod is the same as that of the third section of pin, and the proposal of using the transmission shaft only needs the second transmission shaft to be hollow and internally penetrate the third transmission shaft.
The foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, but all equivalent changes and modifications within the scope of the present invention should be considered as technical scope of the present invention.
Claims (6)
1. Receive and release tripod fast, its characterized in that includes:
the handle is provided with a traction rope and an operating mechanism, and one end of the traction rope is connected with the operating mechanism; when the operating mechanism of the handle is held and pressed, the operating mechanism drives the traction rope to move in the vertical direction;
the support is connected with the handle and comprises a plurality of synchronous opening mechanisms which synchronously rotate by the same angle under the action of external force;
each supporting leg is connected with one synchronous opening mechanism; each supporting leg comprises a plurality of sections of foot pipes which are connected in a nested manner, and the next section of foot pipe can be nested outside the previous section of foot pipe; the inside of each adjacent foot tube is provided with a transmission and locking device; the other end of the traction rope is divided into a plurality of branches which respectively penetrate into a plurality of supporting legs; the traction rope pulls the lower transmission and locking device to realize synchronous retraction of a plurality of foot tubes of each supporting leg;
the operating mechanism comprises a grab handle, a connecting rod, a guide rail and an elastic piece, wherein the guide rail is arranged in the holding part, the end part of the traction rope is connected with one end part of the connecting rod and is arranged in the guide rail, the other end part of the connecting rod is hinged with the upper end part of the grab handle, and the lower part of the grab handle is hinged outside the holding part; the elastic piece is arranged between the grab handle and the holding part;
the synchronous opening mechanism comprises a support and bevel gears, a plurality of supports are uniformly distributed at the lower end of the handle, two sides of each support are provided with one bevel gear through a gear base, and two bevel gears at the same side of two adjacent supports are meshed; the lower end of each gear base is connected with one supporting leg; a through hole for the branch of the traction rope to pass through is formed in the support;
the transmission and locking device comprises a rack, a locking clip and an elastic piece;
in the foot tubes of the plurality of sections, racks are arranged on the inner walls of the other foot tubes except the first foot tube;
the lower ends of the foot pipes except the lowest foot pipe are provided with locking clips and elastic pieces; two sides of each locking clip are axially connected to the inner wall of the corresponding foot tube, one end of each elastic piece is connected with the inner wall of the corresponding foot tube, and the other end of each elastic piece is connected with the tail part of the corresponding locking clip; the lower end of the traction rope is sequentially connected with the tail parts of a plurality of locking clips;
when the joint is in a locking state, the head of each locking clip is inserted into the corresponding rack and is tightly supported by the elastic piece, and two adjacent leg tubes cannot slide relatively; when the traction rope moves, the head of the locking clamp is driven to rotate downwards and separate from the corresponding rack, the joint is unlocked, and two adjacent leg pipes can slide relatively; or,
the transmission and locking device comprises a rack, a locking clip, a hollow shaft seat and an elastic piece;
in the foot tubes of the plurality of sections, racks are arranged on the inner walls of the other foot tubes except the first foot tube;
the lower ends of the foot pipes except the last foot pipe are provided with locking clips, hollow shafts, hollow shaft seats and elastic pieces;
the lower end of the traction rope is connected with the side wall of the hollow shaft of the first section, one end of each elastic piece is connected with the inner wall of the corresponding foot pipe, and the other end of each elastic piece is connected with the corresponding side wall of the hollow shaft; the hollow shaft is connected with the hollow shaft seat in a shaft way, and the hollow shaft seat is connected with the lower end of the first leg pipe; the transmission shaft penetrates through the hollow shaft and the hollow shaft seat; the lower end of the hollow shaft is connected with a locking clip;
when the traction rope moves, the hollow shaft is pulled to rotate, the transmission shaft is driven to synchronously rotate, and then the head of the locking clamp is driven to horizontally rotate and separate from the corresponding rack, so that the retraction and the release of two adjacent foot tubes are realized.
2. The quick release tripod according to claim 1, wherein in the plurality of leg tubes, the locking clip at the second joint is fixedly connected with the traction rope, the tail part of the locking clip at the first joint is provided with a hole with a diameter larger than that of the traction rope, and after the traction rope passes through the hole downwards, a blocking piece is arranged at a position of half the holding stroke length of the operating mechanism and is larger than the aperture of the locking clip; when the traction rope pulls upwards, the locking clamp at the second joint is separated from the rack, the second joint is unlocked, the first joint is still in a locking state, and when the traction rope moves upwards to half of the travel, the blocking piece blocks the hole of the locking clamp at the first joint to separate the locking clamp from the rack, so that the first joint is unlocked at the same time.
3. The quick release tripod of claim 1, wherein an anti-disengagement structure is further provided between adjacent leg tubes; the anti-drop structure is including setting up recess and the anticreep screw on the foot pipe outer wall, and the recess sets up along foot pipe length direction, and the anticreep screw passes lower foot pipe setting in the recess of last foot pipe.
4. The tripod of claim 1, wherein said holding portion has at least two rollers, and said pull cord is wound around said at least two rollers such that the lower end of said pull cord is disposed along the axis of said handle.
5. The quick retraction tripod of claim 1 wherein the first leg tube bottom is provided with a guide shaft and the lower end of the hauling cable is connected to the side wall of the hollow shaft around the guide shaft; the center of the hollow shaft is a non-circular hole, and the transmission shaft penetrates into the non-circular hole and passes through the hollow shaft seat; racks are arranged on two sides of the inner wall of the foot pipe, and a plurality of teeth matched with the racks are arranged on two short sides of the locking clamp.
6. The quick release tripod of claim 1 wherein said leg tube has a circular, oval, square or trapezoidal cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910872262.XA CN110529714B (en) | 2019-09-16 | 2019-09-16 | Tripod capable of being quickly folded and unfolded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910872262.XA CN110529714B (en) | 2019-09-16 | 2019-09-16 | Tripod capable of being quickly folded and unfolded |
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| Publication Number | Publication Date |
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| CN110529714A CN110529714A (en) | 2019-12-03 |
| CN110529714B true CN110529714B (en) | 2024-02-13 |
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| CN201910872262.XA Active CN110529714B (en) | 2019-09-16 | 2019-09-16 | Tripod capable of being quickly folded and unfolded |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112610824B (en) * | 2020-12-18 | 2022-07-15 | 江西精达金属设备有限公司 | Support device for security and protection equipment |
| CN117166719A (en) * | 2023-11-01 | 2023-12-05 | 广东卫兵科技有限公司 | Engineering cost safety device |
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| CN1936690A (en) * | 2005-09-20 | 2007-03-28 | 杨永坚 | Tripod of camera |
| CN2802547Y (en) * | 2005-09-22 | 2006-08-02 | 杨永坚 | Tripod for camera |
| WO2011026444A1 (en) * | 2009-09-07 | 2011-03-10 | Fung Ngo Leung | Supporting device |
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| CN110529714A (en) | 2019-12-03 |
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